Caridad McKiver, who turned 100 Thursday, said the secret to a long life is love and finding a big man who you can rest on at night.

“It’s love that got me here,” she said during a birthday bash at an Upper East Side nursing home. “I like big men. They are sweeter, more passionate and patient,” she added.

The spunky senior, who wore a tiara to celebrate the big day, has been single since her 6-foot, 185-pound husband, William, died in 1986…McKiver, who lived in East Harlem, walked to her job as a nurse’s aide at Mount Sinai Hospital every day for 25 years.